Optical device with memory function employing liquid crystal/ori

Details Optical device with memory function employing liquid crystal/ori Optical device with memory function employing liquid crystal/ori

1996-10-25

2000-02-08

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 23, 349 36, G02F 1133, G02F 1137, G02F 11333

Patent

active

060233125

ABSTRACT:
An optical device employs a composite of a liquid crystalline substance and an orientation-sustaining material, such as a selected polymer, flat particles, or other material capable of sustaining the state of orientation of the liquid crystalline substance. The optical device has a memory function which is erased by the application of an electrical signal. External force for writing on the device generates local changes of the state of orientation of the liquid crystalline substance. The written display is memorized, and can be erased by the application of an electrical signal. When a two-frequency-driving liquid crystalline substance is used, the device has a long-term memory function. In this device, writing can be conducted at one frequency and erasure easily conducted at the other frequency. These optical devices can be used for light adjustment, display, and data storage.

REFERENCES:
patent: 4527862 (1985-07-01), Arakawa
patent: 4685771 (1987-08-01), West et al.
patent: 4944576 (1990-07-01), Lacker et al.
patent: 5223959 (1993-06-01), Wu et al.
patent: 5409744 (1995-04-01), Gotoh et al.
patent: 5621552 (1997-04-01), Coates et al.

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